v4 provides an API: ST.add(String, Object). I couldn't find the v3 API setAttributes(Object) in v4.
I used ST.add("root", JSONObject). An exception occures:
java.lang.IllegalArgumentException: no such attribute: root
at org.stringtemplate.v4.ST.add(ST.java:223)
at jjs.stst.STStandaloneTool.invokeTemplate(STStandaloneTool.java:479)
at jjs.stst.STStandaloneTool.generate(STStandaloneTool.java:420)
at jjs.stst.STStandaloneTool.main(STStandaloneTool.java:722)
Help is appreciated.